OPEN FORUM
Hazardous Waste
EFFECTIVE
MANAGEMENT IMPERATIVE
By Dhurjati Mukherjee
With rapid advancement and industrialization, generation of
different kinds of wastes has increased significantly in recent times,
specially in the last decade or so. Among the different types, the most
disturbing and injurious to human health is hazardous wastes, whose management
and control has been a significant problem in most countries of the world.
Hazardous waste thus may be defined as any discarded liquid
or solid that contains substances known to be: fatal to humans or laboratory
animals in low doses; toxic, carcinogenic, mutagenic or teratogenic to humans
or other life forms;ignitable with a flash point less
than 600 C; corrosive; or explosive or highly reactive that is,
undergoes violent chemical reactions either by itself or when mixed with other
materials. These wastes can be anything from pesticides to toxic byproducts
from the industrial sector and come in various forms like liquid and sludge.
While each country is governed by different set of rules and
perceptions in categorizing hazardous waste, it is the Basel Convention on
Trans-boundary Movements of Hazardous Wastes that is the widely regarded for
disposal and other matters. In 1994 a diverse coalition of environmentalists
and developing countries passed thee
Basel Ban in Geneva,
which became a forerunner to a wider ban on all forms of hazardous waste. In
fact, the Basel Convention is the most recognized international law when it
comes to hazardous waste, even though there are other agreements such as the
Rotterdam Convention (1998).
In India,
the rapid growth of industrial as also the services sectors has put the country
in a situation where controlling hazardous waste has emerged as a serious
problem. An important component of this is e-waste, which a study by the
Environment Management and Policy Research has confirmed would boomerang in the
next five years, if effective steps were not taken now. Undertaken in Bangalore, it has
predicted that such e-waste would increase 10-fold by the year 2020.
The burning of plastics and printed circuit boards and all
other forms of e-waste in illegal dumps near residential colonies release toxic
and carcinogenic substances into the air. The recyclers in most parts of the
country do not have the right technology and are ill- equipped to handle such
waste. One may mention here that the common forms of e-waste like barium,
beryllium, cadmium, chromium lead and mercury severely jeopardize the
environment and affect human health. While barium damages heart and liver,
beryllium and cadmium may lead to cancer.
Apart from this, India
has the world’s largest scrapping site for ocean-going ships in Alang in Gujarat. Due to poor infrastructure and awful working
conditions, the industry presents a picture of continuing environmental
degradation from contamination to ineffective implementation of safety
standards. According to a Greenpeace report on Alang shipyard: “Sediments in
Alang were more contaminated than the most heavily industrialized areas”. The
dangerous conditions of falling debris, explosions caused by the on-bound gases
and suffocation from carbon dioxide causing deaths and injuries aggravate the
problem there.
The Greenpeace report has further pointed out that one in
every four workers succumbed to cancer because of exposure to toxic fumes at
the site. Moreover, ship breaking activities affect even the neighbouring areas
beyond the yard as pollutants seep into the natural environment. This has a
disastrous affect, damaging not only agricultural lands and livelihoods and
also the health of the inhabitants, who are mostly poor and do not have enough
money for proper treatment.
There are regulations on a national level for hazardous
waste and chemicals, including the Hazardous Waste Management and Handling
Rules of December 1989 and various amendments have come into force from time to
time. These prohibit the impost of hazardous waste to and from India for
dumping or disposal and the need to address
the requirements as outlined by the Basel Convention. But the Government
continues to lack the political will for effective implementation of the rules
to protect the communities from environmental pollution if such ship breaking
or e-waste recycling/processing
takes place in an amateurish manner.
As many developed countries implement stricter environmental
regulations, they try to transfer their toxic technologies to the Third World. India is just not a soft target but
rather has the image of a welcome target for the dumping of toxic vessels. Look at the way it has responded with the Riky
and the Clemenceau. Environmentalists contend that the time has come
for the government to acknowledge the seriousness
of the problem and act accordingly.
Among the biggest problems in cleaning any hazardous waste
sites are questions of liability and the degree of purity required. In many
cities, these problems have created large areas of contaminated properties (known
as brownfields) that have been abandoned or are not being used to their
potential because of real or suspected pollution. It is estimated that up to
one-third of all commercial and industrial sites in many big cities fall in
this category.
While producing less
waste has been a cry the world over, recycling and reuse also eliminates
hazardous wastes and pollution. Many waste products of one process or industry are valuable commodities in another.
Already, over 10 per cent of the wastes that would otherwise enter the waste
stream in the United States
are sent to surplus material exchanges where they are sold as raw materials for
use by other industries. In India
also a considerable amount of waste is recycled but the process adopted here may not always be environment
friendly.
Several processes
are available to make hazardous waste less
toxic, which includes physical treatments, incineration and chemical processing. It is generally agreed that incineration is
quick and relatively easy and most suitable for many countries, including India, as the
ash resulting from incineration is reduced in volume up to 90 per cent and
often is safer to store in a landfill or other disposal site than the original
wastes.
However, one of the most popular solutions for hazardous
waste has been land-filling. Newer techniques make it possible
to create safe and modern landfills that are acceptable for disposing of many
hazardous wastes. The first line of defense in a secure landfill is a thick
bottom cushion of compacted clay that surrounds the pit like a bathtub. Moist
clay is flexible and resists cracking if the ground shifts. It is impermeable
to groundwater and will safely contain wastes. It needs to be mentioned here
that when the landfill has reached its optimum capacity, a cover like the
bottom sandwich of clay, plastic and soil should cap the site.
Hazardous waste management has indeed become a problem,
right from transportation to disposal sites as also its storage and/or
disposal. This is more so because such wastes remain toxic long after businesses that created them are gone. As in the case with
nuclear wastes, it is necessary to
create strong institutional framework for proper care and management of these
wastes so that they may not jeopardize the environment and affect human health.
---INFA
(Copyright,
India News & Feature Alliance)
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